Stalin’s first five-year plan resulted in
a. improved workers’ lives.
c. successful competition in a capitalist world.
b. boom in heavy industry.
d. none of the above.

The correct answer is B. Stalin's first five-year plan resulted in a boom in heavy industry.

Explanation:

The first five-year plan was decided in 1928 and applied to the period 1929 to 1933. The five-year plan was the tool that Stalin, after clearing the Trotskyst opposition and gaining absolute power in the Soviet Union, introduced to accelerate industrialization. In these five-year plans, the Soviet Union's economy would be planned for five years to come. The first plan had an immense goal: over five years, total industrial production would increase by 250 percent, agricultural production by 150 percent, investment by 220 percent and consumption by 70 percent. In doing so, Stalin also abandoned Lenin's new economic policy (NEP), which Stalin previously defended from Trotsky's criticism. Stalin began by focusing on the heavy industry, the light industry (clothes, detergents, etc.) came second.

is there a year set? the question is incomplete